using Vanguard.Rules.Cards;

namespace Vanguard.Rules.Engine.Abilities;

/// <summary>Скрипты карт первого сета, подключённые к движку.</summary>
public static class CardScripts
{
    public static IReadOnlyDictionary<string, CardScript> Default { get; } =
        new Dictionary<string, CardScript>(StringComparer.Ordinal)
        {
            ["barcgal"] = new BarcgalScript(),
            ["wingal"] = new WingalScript(),
            ["king-of-knights-alfred"] = new AlfredScript(),
            ["blaster-blade"] = new BlasterBladeScript(),
            ["lake-maiden-lien"] = new DrawOneScript("lake-maiden-lien"),
            ["dragon-monk-gojo"] = new DrawOneScript("dragon-monk-gojo"),
            ["screamin-and-dancin-announcer-shout"] = new DrawOneScript("screamin-and-dancin-announcer-shout"),
        };
}

/// <summary>
/// «[ACT]: повернуть эту карту и сбросить карту из руки → взять карту».
/// Общий скрипт для Lake Maiden, Lien, Dragon Monk, Gojo и Shout.
/// </summary>
public sealed class DrawOneScript : CardScript
{
    public DrawOneScript(string nameId) => NameId = nameId;

    public override string NameId { get; }

    public override IEnumerable<ActivatedAbility> Activated
    {
        get
        {
            yield return new ActivatedAbility
            {
                CanActivate = _ => true,
                RestsSelf = true,
                RequiresDiscard = true,
                Resolve = ctx => ctx.Engine.DrawCards(ctx.Owner, 1),
            };
        }
    }
}

/// <summary>
/// Blaster Blade: при размещении оплатить Counter Blast 2 и уничтожить Арьергард противника.
/// На Авангарде — любой, на Арьергарде — только 2 ранга или выше и при Авангарде Royal Paladin.
/// </summary>
public sealed class BlasterBladeScript : CardScript
{
    public override string NameId => "blaster-blade";

    public override IEnumerable<AbilityDefinition> Abilities
    {
        get
        {
            yield return new AbilityDefinition
            {
                Trigger = AbilityTrigger.OnPlace,
                Optional = true,
                Condition = ctx => ctx.Engine.IsVanguardOf(ctx.Source, ctx.Owner),
                CanPay = ctx => ctx.Engine.CanCounterBlast(ctx.Owner, 2),
                Pay = ctx => ctx.Engine.CounterBlast(ctx.Owner, 2),
                Resolve = ctx =>
                {
                    var opponent = 1 - ctx.Owner;
                    var slots = ctx.Engine.RearGuardSlots(opponent, _ => true);
                    if (slots.Count == 0)
                        return;

                    ctx.Engine.AskUnitChoice(
                        ctx.Owner,
                        opponent,
                        "Выберите Арьергард противника",
                        slots,
                        slot => ctx.Engine.RetireRearGuard(opponent, slot));
                },
            };

            yield return new AbilityDefinition
            {
                Trigger = AbilityTrigger.OnPlace,
                Optional = true,
                Condition = ctx =>
                    !ctx.Engine.IsVanguardOf(ctx.Source, ctx.Owner) &&
                    ctx.Engine.VanguardClan(ctx.Owner) == Clan.RoyalPaladin,
                CanPay = ctx => ctx.Engine.CanCounterBlast(ctx.Owner, 2),
                Pay = ctx => ctx.Engine.CounterBlast(ctx.Owner, 2),
                Resolve = ctx =>
                {
                    var opponent = 1 - ctx.Owner;
                    var slots = ctx.Engine.RearGuardSlots(opponent, d => d.Grade >= 2);
                    if (slots.Count == 0)
                        return;

                    ctx.Engine.AskUnitChoice(
                        ctx.Owner,
                        opponent,
                        "Выберите Арьергард противника 2 ранга или выше",
                        slots,
                        slot => ctx.Engine.RetireRearGuard(opponent, slot));
                },
            };
        }
    }
}

/// <summary>
/// Barcgal: когда другой Royal Paladin сменяет эту карту, вы можете призвать её в круг Арьергарда.
/// </summary>
public sealed class BarcgalScript : CardScript
{
    public override string NameId => "barcgal";

    public override IEnumerable<AbilityDefinition> Abilities
    {
        get
        {
            yield return new AbilityDefinition
            {
                Trigger = AbilityTrigger.OnRideOver,
                Optional = true,
                Condition = ctx =>
                    ctx.Other is not null &&
                    ctx.Catalog.CardOf(ctx.Other.PrintingId).Clan == Clan.RoyalPaladin,
                Resolve = ctx => ctx.Engine.CallFromSoul(ctx.Source, ctx.Owner),
            };
        }
    }
}

/// <summary>
/// Wingal: когда эта карта поддерживает Blaster Blade, усиленная карта получает +4000 до конца боя.
/// </summary>
public sealed class WingalScript : CardScript
{
    private const string BlasterBlade = "blaster-blade";

    public override string NameId => "wingal";

    public override IEnumerable<AbilityDefinition> Abilities
    {
        get
        {
            yield return new AbilityDefinition
            {
                Trigger = AbilityTrigger.OnBoost,
                Condition = ctx =>
                    ctx.Other is not null &&
                    ctx.Catalog.CardOf(ctx.Other.PrintingId).NameId == BlasterBlade,
                Resolve = ctx => ctx.Engine.AddBattlePower(4000),
            };
        }
    }
}

/// <summary>
/// King of Knights, Alfred: в свой ход на круге Авангарда получает +2000
/// за каждый свой Арьергард Royal Paladin.
/// </summary>
public sealed class AlfredScript : CardScript
{
    public override string NameId => "king-of-knights-alfred";

    public override IEnumerable<ContinuousAbility> Continuous
    {
        get
        {
            yield return new ContinuousAbility
            {
                Applies = ctx =>
                    ctx.Engine.IsVanguardOf(ctx.Source, ctx.Owner) &&
                    ctx.State.ActivePlayer == ctx.Owner,
                PowerBonus = ctx => 2000 * ctx.Engine.CountRearGuards(ctx.Owner, Clan.RoyalPaladin),
            };
        }
    }
}